GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/asn1/x_pubkey.c Lines: 60 171 35.1 %
Date: 2017-11-13 Branches: 26 82 31.7 %

Line Branch Exec Source
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/* $OpenBSD: x_pubkey.c,v 1.26 2017/01/29 17:49:22 beck Exp $ */
2
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3
 * All rights reserved.
4
 *
5
 * This package is an SSL implementation written
6
 * by Eric Young (eay@cryptsoft.com).
7
 * The implementation was written so as to conform with Netscapes SSL.
8
 *
9
 * This library is free for commercial and non-commercial use as long as
10
 * the following conditions are aheared to.  The following conditions
11
 * apply to all code found in this distribution, be it the RC4, RSA,
12
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13
 * included with this distribution is covered by the same copyright terms
14
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15
 *
16
 * Copyright remains Eric Young's, and as such any Copyright notices in
17
 * the code are not to be removed.
18
 * If this package is used in a product, Eric Young should be given attribution
19
 * as the author of the parts of the library used.
20
 * This can be in the form of a textual message at program startup or
21
 * in documentation (online or textual) provided with the package.
22
 *
23
 * Redistribution and use in source and binary forms, with or without
24
 * modification, are permitted provided that the following conditions
25
 * are met:
26
 * 1. Redistributions of source code must retain the copyright
27
 *    notice, this list of conditions and the following disclaimer.
28
 * 2. Redistributions in binary form must reproduce the above copyright
29
 *    notice, this list of conditions and the following disclaimer in the
30
 *    documentation and/or other materials provided with the distribution.
31
 * 3. All advertising materials mentioning features or use of this software
32
 *    must display the following acknowledgement:
33
 *    "This product includes cryptographic software written by
34
 *     Eric Young (eay@cryptsoft.com)"
35
 *    The word 'cryptographic' can be left out if the rouines from the library
36
 *    being used are not cryptographic related :-).
37
 * 4. If you include any Windows specific code (or a derivative thereof) from
38
 *    the apps directory (application code) you must include an acknowledgement:
39
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40
 *
41
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51
 * SUCH DAMAGE.
52
 *
53
 * The licence and distribution terms for any publically available version or
54
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55
 * copied and put under another distribution licence
56
 * [including the GNU Public Licence.]
57
 */
58
59
#include <stdio.h>
60
61
#include <openssl/opensslconf.h>
62
63
#include <openssl/asn1t.h>
64
#include <openssl/err.h>
65
#include <openssl/x509.h>
66
67
#ifndef OPENSSL_NO_DSA
68
#include <openssl/dsa.h>
69
#endif
70
#ifndef OPENSSL_NO_RSA
71
#include <openssl/rsa.h>
72
#endif
73
74
#include "asn1_locl.h"
75
76
/* Minor tweak to operation: free up EVP_PKEY */
77
static int
78
pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
79
{
80
159196
	if (operation == ASN1_OP_FREE_POST) {
81
13251
		X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
82
13251
		EVP_PKEY_free(pubkey->pkey);
83
13251
	}
84
79598
	return 1;
85
}
86
87
static const ASN1_AUX X509_PUBKEY_aux = {
88
	.asn1_cb = pubkey_cb,
89
};
90
static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = {
91
	{
92
		.offset = offsetof(X509_PUBKEY, algor),
93
		.field_name = "algor",
94
		.item = &X509_ALGOR_it,
95
	},
96
	{
97
		.offset = offsetof(X509_PUBKEY, public_key),
98
		.field_name = "public_key",
99
		.item = &ASN1_BIT_STRING_it,
100
	},
101
};
102
103
const ASN1_ITEM X509_PUBKEY_it = {
104
	.itype = ASN1_ITYPE_SEQUENCE,
105
	.utype = V_ASN1_SEQUENCE,
106
	.templates = X509_PUBKEY_seq_tt,
107
	.tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
108
	.funcs = &X509_PUBKEY_aux,
109
	.size = sizeof(X509_PUBKEY),
110
	.sname = "X509_PUBKEY",
111
};
112
113
114
X509_PUBKEY *
115
d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len)
116
{
117
	return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
118
	    &X509_PUBKEY_it);
119
}
120
121
int
122
i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out)
123
{
124
12
	return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it);
125
}
126
127
X509_PUBKEY *
128
X509_PUBKEY_new(void)
129
{
130
88
	return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it);
131
}
132
133
void
134
X509_PUBKEY_free(X509_PUBKEY *a)
135
{
136
88
	ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);
137
44
}
138
139
int
140
X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
141
{
142
	X509_PUBKEY *pk = NULL;
143
144
88
	if (x == NULL)
145
		return (0);
146
44
	if ((pk = X509_PUBKEY_new()) == NULL)
147
		goto error;
148
149
44
	if (pkey->ameth) {
150
44
		if (pkey->ameth->pub_encode) {
151
44
			if (!pkey->ameth->pub_encode(pk, pkey)) {
152
				X509error(X509_R_PUBLIC_KEY_ENCODE_ERROR);
153
				goto error;
154
			}
155
		} else {
156
			X509error(X509_R_METHOD_NOT_SUPPORTED);
157
			goto error;
158
		}
159
	} else {
160
		X509error(X509_R_UNSUPPORTED_ALGORITHM);
161
		goto error;
162
	}
163
164
44
	if (*x != NULL)
165
40
		X509_PUBKEY_free(*x);
166
167
44
	*x = pk;
168
169
44
	return 1;
170
171
error:
172
	if (pk != NULL)
173
		X509_PUBKEY_free(pk);
174
	return 0;
175
44
}
176
177
EVP_PKEY *
178
X509_PUBKEY_get(X509_PUBKEY *key)
179
{
180
	EVP_PKEY *ret = NULL;
181
182
12706
	if (key == NULL)
183
		goto error;
184
185
6353
	if (key->pkey != NULL) {
186
4490
		CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
187
4490
		return key->pkey;
188
	}
189
190
1863
	if (key->public_key == NULL)
191
		goto error;
192
193
1863
	if ((ret = EVP_PKEY_new()) == NULL) {
194
		X509error(ERR_R_MALLOC_FAILURE);
195
		goto error;
196
	}
197
198
1863
	if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
199
		X509error(X509_R_UNSUPPORTED_ALGORITHM);
200
		goto error;
201
	}
202
203
1863
	if (ret->ameth->pub_decode) {
204
1863
		if (!ret->ameth->pub_decode(ret, key)) {
205
			X509error(X509_R_PUBLIC_KEY_DECODE_ERROR);
206
			goto error;
207
		}
208
	} else {
209
		X509error(X509_R_METHOD_NOT_SUPPORTED);
210
		goto error;
211
	}
212
213
	/* Check to see if another thread set key->pkey first */
214
1863
	CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
215
1863
	if (key->pkey) {
216
		CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
217
		EVP_PKEY_free(ret);
218
		ret = key->pkey;
219
	} else {
220
1863
		key->pkey = ret;
221
1863
		CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
222
	}
223
1863
	CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
224
225
1863
	return ret;
226
227
error:
228
	EVP_PKEY_free(ret);
229
	return (NULL);
230
6353
}
231
232
/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
233
 * and encode or decode as X509_PUBKEY
234
 */
235
236
EVP_PKEY *
237
d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
238
{
239
	X509_PUBKEY *xpk;
240
	EVP_PKEY *pktmp;
241
	xpk = d2i_X509_PUBKEY(NULL, pp, length);
242
	if (!xpk)
243
		return NULL;
244
	pktmp = X509_PUBKEY_get(xpk);
245
	X509_PUBKEY_free(xpk);
246
	if (!pktmp)
247
		return NULL;
248
	if (a) {
249
		EVP_PKEY_free(*a);
250
		*a = pktmp;
251
	}
252
	return pktmp;
253
}
254
255
int
256
i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
257
{
258
8
	X509_PUBKEY *xpk = NULL;
259
	int ret;
260
4
	if (!a)
261
		return 0;
262
4
	if (!X509_PUBKEY_set(&xpk, a))
263
		return 0;
264
4
	ret = i2d_X509_PUBKEY(xpk, pp);
265
4
	X509_PUBKEY_free(xpk);
266
4
	return ret;
267
4
}
268
269
/* The following are equivalents but which return RSA and DSA
270
 * keys
271
 */
272
#ifndef OPENSSL_NO_RSA
273
RSA *
274
d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
275
{
276
	EVP_PKEY *pkey;
277
	RSA *key;
278
	const unsigned char *q;
279
	q = *pp;
280
	pkey = d2i_PUBKEY(NULL, &q, length);
281
	if (!pkey)
282
		return NULL;
283
	key = EVP_PKEY_get1_RSA(pkey);
284
	EVP_PKEY_free(pkey);
285
	if (!key)
286
		return NULL;
287
	*pp = q;
288
	if (a) {
289
		RSA_free(*a);
290
		*a = key;
291
	}
292
	return key;
293
}
294
295
int
296
i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
297
{
298
	EVP_PKEY *pktmp;
299
	int ret;
300
	if (!a)
301
		return 0;
302
	pktmp = EVP_PKEY_new();
303
	if (!pktmp) {
304
		ASN1error(ERR_R_MALLOC_FAILURE);
305
		return 0;
306
	}
307
	EVP_PKEY_set1_RSA(pktmp, a);
308
	ret = i2d_PUBKEY(pktmp, pp);
309
	EVP_PKEY_free(pktmp);
310
	return ret;
311
}
312
#endif
313
314
#ifndef OPENSSL_NO_DSA
315
DSA *
316
d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
317
{
318
	EVP_PKEY *pkey;
319
	DSA *key;
320
	const unsigned char *q;
321
	q = *pp;
322
	pkey = d2i_PUBKEY(NULL, &q, length);
323
	if (!pkey)
324
		return NULL;
325
	key = EVP_PKEY_get1_DSA(pkey);
326
	EVP_PKEY_free(pkey);
327
	if (!key)
328
		return NULL;
329
	*pp = q;
330
	if (a) {
331
		DSA_free(*a);
332
		*a = key;
333
	}
334
	return key;
335
}
336
337
int
338
i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
339
{
340
	EVP_PKEY *pktmp;
341
	int ret;
342
	if (!a)
343
		return 0;
344
	pktmp = EVP_PKEY_new();
345
	if (!pktmp) {
346
		ASN1error(ERR_R_MALLOC_FAILURE);
347
		return 0;
348
	}
349
	EVP_PKEY_set1_DSA(pktmp, a);
350
	ret = i2d_PUBKEY(pktmp, pp);
351
	EVP_PKEY_free(pktmp);
352
	return ret;
353
}
354
#endif
355
356
#ifndef OPENSSL_NO_EC
357
EC_KEY *
358
d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
359
{
360
	EVP_PKEY *pkey;
361
	EC_KEY *key;
362
	const unsigned char *q;
363
	q = *pp;
364
	pkey = d2i_PUBKEY(NULL, &q, length);
365
	if (!pkey)
366
		return (NULL);
367
	key = EVP_PKEY_get1_EC_KEY(pkey);
368
	EVP_PKEY_free(pkey);
369
	if (!key)
370
		return (NULL);
371
	*pp = q;
372
	if (a) {
373
		EC_KEY_free(*a);
374
		*a = key;
375
	}
376
	return (key);
377
}
378
379
int
380
i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
381
{
382
	EVP_PKEY *pktmp;
383
	int ret;
384
	if (!a)
385
		return (0);
386
	if ((pktmp = EVP_PKEY_new()) == NULL) {
387
		ASN1error(ERR_R_MALLOC_FAILURE);
388
		return (0);
389
	}
390
	EVP_PKEY_set1_EC_KEY(pktmp, a);
391
	ret = i2d_PUBKEY(pktmp, pp);
392
	EVP_PKEY_free(pktmp);
393
	return (ret);
394
}
395
#endif
396
397
int
398
X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype,
399
    void *pval, unsigned char *penc, int penclen)
400
{
401
88
	if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
402
		return 0;
403
44
	if (penc) {
404
44
		free(pub->public_key->data);
405
44
		pub->public_key->data = penc;
406
44
		pub->public_key->length = penclen;
407
		/* Set number of unused bits to zero */
408
44
		pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
409
44
		pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
410
44
	}
411
44
	return 1;
412
44
}
413
414
int
415
X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk,
416
    int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub)
417
{
418
3726
	if (ppkalg)
419
		*ppkalg = pub->algor->algorithm;
420
1863
	if (pk) {
421
1863
		*pk = pub->public_key->data;
422
1863
		*ppklen = pub->public_key->length;
423
1863
	}
424
1863
	if (pa)
425
4
		*pa = pub->algor;
426
1863
	return 1;
427
}